During a trail hike at Arbor Hills Nature Preserve during some of the peak hours of the big ice storm that hit the US this passed weekend, Me, my girlfriend, and a friend witnessed a larger circular light appear in the clouds about a mile East of us. The size of the circle must have been near a quarter mile, it lit up the entire sky. The light first flashed blue then green then cut off like someone turned off a light switch. The light was clearly coming from above/behind the storm clouds. We continued to walk in shock and saw the light once again a few miles further East about 30minutes later. Absolutely no other visible objects in the sky.